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在柱坐标下,建立热单轴介质光热辐射的三维理论模型,比较后得知一维模型的不足。同时,得出入射高斯光束光斑半径与样品半径之比大于0.7时,三维理论模型完全可用一维理论模型替代。
Under the cylindrical coordinates, a three-dimensional theoretical model of thermo uniaxial medium photothermal radiation is established, and the deficiency of the one-dimensional model is obtained after comparison. At the same time, it is concluded that the ratio of the incident spot Gaussian beam spot radius to the sample radius is greater than 0.7, and the three-dimensional theoretical model can be completely replaced by the one-dimensional theoretical model.